Thermosensitive recording material

Abstract

The present invention provides a material that is less likely to cause flex cracking, has high scratch resistance, and is suitable for a protective layer for a thermosensitive material. A thermosensitive recording material according to the present invention includes a base, a thermosensitive recording layer formed on the base, and a protective layer formed on the thermosensitive recording layer, wherein the protective layer is formed from a mixture that contains an emulsion (a) containing particles formed of a hydrophobic polymer (1) and a hydrophilic polymer (2); and a non-crosslinking urea compound (b). Preferably, the hydrophobic polymer (1) contains an acrylonitrile-derived constitutional unit. Preferably, the non-crosslinking urea compound (b) is urea or a urea derivative.

1. A thermosensitive recording material comprising:
 a base; a thermosensitive recording layer formed on the base; and a protective layer formed on the thermosensitive recording layer, 
 wherein the protective layer is formed from a mixture that contains an emulsion (a) containing particles formed of a hydrophobic polymer (1) and a hydrophilic polymer (2); and a non-crosslinking urea compound (b). 
 
     
     
       2. The thermosensitive recording material according to  claim 1 , wherein the hydrophobic polymer (1) contains an acrylonitrile-derived constitutional unit. 
     
     
       3. The thermosensitive recording material according to  claim 1  or  2 , wherein the hydrophilic polymer (2) contains a methacrylamide-derived constitutional unit. 
     
     
       4. The thermosensitive recording material according to  claim 1 , wherein the thermosensitive recording material contains 1 to 50 parts by weight of the non-crosslinking urea compound (b) per 100 parts by weight in total of the hydrophobic polymer (1) and the hydrophilic polymer (2). 
     
     
       5. The thermosensitive recording material according to  claim 1 , wherein the non-crosslinking urea compound (b) is urea or a urea derivative. 
     
     
       6. The thermosensitive recording material according to  claim 1 , wherein the non-crosslinking urea compound (b) is at least one compound selected from the group consisting of urea, monoalkylureas, dialkylureas, hydroxyalkylureas, and biuret.